headers: remove sched.h from poll.h

Signed-off-by: Alexey Dobriyan <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index ced186d..5089331 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -33,6 +33,7 @@
 #include <linux/mutex.h>
 #include <linux/poll.h>
 #include <linux/preempt.h>
+#include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/time.h>
 #include <linux/uaccess.h>